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Re: multi segment single laye



Tesla List wrote:
> 
> >From richard.craven-at-mkbbs.co.ukTue Nov 19 21:43:22 1996
> Date: Mon, 18 Nov 96 23:10 +0000
> From: richard.craven-at-mkbbs.co.uk
> To: TESLA-at-pupman-dot-com
> Subject: multi segment single laye
> 
> Hello all
> 
> I recently holidayed in Boston and I was fortunate enough to chat to
> Robert Stephens in Toronto, whilst he was in the middle of his move to
> Shelburne.
> 
> A couple of comments came up: he mentioned how his original stainless
> steel RSG burnt away in the space of a few minutes when he was switching
> caps charged from a 7kVA source. He went to tungsten and found that the
> wear rate diminished to practically zero.
> 
> I can't afford to do the same to my RSG which is, by the sounds of
> things, almost identical to Roberts' , but I can get some tungsten
> carbide elements to face the s-s rotors and stators with.
> 
> Does anyone have some specs for bulk resistivity that they can quote for
> tungsten carbide? I know there are dozens of grades, coatings etc. but
> an approximate figure will do.
> 
> Secondly, we spoke about something that has been puzzling me. I draw
> your attention to the front cover of the catalogue published by
> Information Unlimited, Amherst, New Hampshire USA. It is run by Robert
> Iannini and supplies lots of kits including at least three TCs (TC3,4
> and 5) as well as various appropriate components.
> 
> The front cover shows what appears to be a good performer in the shape
> of a 2 coil TC: the primary looks to be quite small in diameter, and
> maybe Cu ribbon or strip etc. The interesting feature for me is that the
> secondary appears to be wound in a number of sections. The photograph
> (which also turns up on the front of R Iannini's book, "Build Your Own
> Space Age Laser etc. etc.") shows a cylindrical secondary of typical
> proportions, wound in half a dozen sections of relatively closewound
> turns, each separated from the next by a couple of inches. It may be
> that this is merely black tape, holding the windings in place, but I
> think it is something else.
> 
> The picture isn't overly clear. What does anyone think?
> 
> Incidentally, the photo credit on older catalogues was given to someone
> in Texas (first name Dan) but the latest attributes the TC to Durlin Cox
> of Resonance research, Baraboo, WI.
> 
> Richard Craven
> ---
>  CMPQwk #1.42 UNREGISTERED EVALUATION COPY



Richard:


  The reason for the differing colors on the secondary is due to the
fact that the lower section was fried and the wire was replaced. Frankly,
that particular coil isn't all that spectacular from a size/performance
standpoint.

  (This information was received on good authority from Bill Wysock
some years ago when I asked a similar question.)

- Brent


BTW - I installed 3/16" 'pure' tungsten rods into my RSG, and only with
an approx. 3.5 KVA level, the rod ends ablated rather quickly. A lot
depends upon the size of the electrode relative to the current flow.